// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
#pragma once

#include <cmath>
#include <iostream>
#include <sstream>
#include <string>
#include <unordered_map>

#include <pollux/common/base/exceptions.h>
#include <pollux/expression/type_signature.h>

namespace kumo::pollux::exec {

class Scanner : public yyFlexLexer {
 public:
  Scanner(
      std::istream& arg_yyin,
      std::ostream& arg_yyout,
      TypeSignaturePtr& outputType,
      const std::string_view input)
      : yyFlexLexer(&arg_yyin, &arg_yyout),
        outputType_(outputType),
        input_(input) {}
  int lex(Parser::semantic_type* yylval);

  void setTypeSignature(TypeSignaturePtr type) {
    outputType_ = std::move(type);
  }

  // Store input to print it as part of the error message.
  std::string_view input() {
    return input_;
  }

 private:
  TypeSignaturePtr& outputType_;
  const std::string_view input_;
};

} // namespace kumo::pollux::exec
